We present measurements of the production of D-s mesons relative to D+s mesons as functions of xF and of p2t for a sample of 2445 Ds decays to φπ. The Ds mesons were produced in Fermilab experiment E791 with 500 GeV/c π- mesons incident on one platinum and four carbon foil targets. The acceptance-corrected integrated asymmetry in the xF range -0.1 to 0.5 for D∓s mesons is 0.032 ± 0.022 ± 0.022, consistent with no net asymmetry. We compare the results as functions of xF and p2t to predictions and to the large production asymmetry observed for D± mesons in the same experiment. These comparisons support the hypothesis that production asymmetries come from the fragmentation process and not from the charm quark production itself.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 9 Oct 1997|